What’s Vulnerable › Vulnerabilities

CVE-2026-91752: GNU libextractor before 1.15 Stack Overflow via OLE2

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-15 · updated 2026-09-24
• Weakness: CWE-789

Description

GNU libextractor before 1.15 contains a stack-based buffer overflow vulnerability in the process_star_office function that sizes a variable-length stack array from attacker-controlled OLE2 stream data. Attackers can craft malicious StarOffice documents that allocate up to 4 MB on the stack, causing stack overflow and crashing any application extracting metadata from the document.

Affected products

• GNU libextractor: before 1.15 — fixed in 1.15

How to fix

Upgrade to a fixed version: GNU libextractor 1.15. Check the vendor advisory for mitigations.

References

• https://git.gnunet.org/gnunet/libextractor/commit/04004eb19033e093938138b09befdf31e71e8522.html
• https://git.gnunet.org/gnunet/libextractor/commit/2781c7e9095f4ddaff4f535d69342f3903b18422.html
• https://github.com/Haitam-lazaar/libextractor-ole2-rce
• https://www.gnu.org/software/libextractor/
• https://www.vulncheck.com/advisories/gnu-libextractor-before-1.15-stack-overflow-via-ole2
• http://www.openwall.com/lists/oss-security/2026/09/16/16

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